package com.qdxwx.quartz.util;

import com.qdxwx.common.constants.ScheduleConstants;
import com.qdxwx.common.exception.job.TaskException;
import com.qdxwx.common.exception.job.TaskException.Code;
import com.qdxwx.quartz.domain.Job;
import org.quartz.*;

/**
 * 定时任务工具类
 * 
 * @author qdxwx
 *
 */
public class ScheduleUtils {
    /**
     * 得到quartz任务类
     *
     * @param job 执行计划
     * @return 具体执行任务类
     */
    private static Class<? extends org.quartz.Job> getQuartzJobClass(Job job) {
        boolean isConcurrent = "0".equals(job.getConcurrent());
        return isConcurrent ? QuartzJobExecution.class : QuartzDisallowConcurrentExecution.class;
    }

    /**
     * 构建任务触发对象
     */
    public static TriggerKey getTriggerKey(Long jobId, String jobGroup) {
        return TriggerKey.triggerKey(ScheduleConstants.TASK_CLASS_NAME + jobId, jobGroup);
    }

    /**
     * 构建任务键对象
     */
    public static JobKey getJobKey(Long jobId, String jobGroup) {
        return JobKey.jobKey(ScheduleConstants.TASK_CLASS_NAME + jobId, jobGroup);
    }

    /**
     * 创建定时任务
     */
    public static void createScheduleJob(Scheduler scheduler, Job job) throws SchedulerException, TaskException {
        Class<? extends org.quartz.Job> jobClass = getQuartzJobClass(job);
        // 构建job信息
        Long jobId = job.getJobId();
        String jobGroup = job.getJobGroup();
        // JobKey
        JobKey jobKey = getJobKey(jobId, jobGroup);
        JobDetail jobDetail = JobBuilder.newJob(jobClass).withIdentity(jobKey).build();

        // 表达式调度构建器
        CronScheduleBuilder cronScheduleBuilder = CronScheduleBuilder.cronSchedule(job.getCronExpression());
        cronScheduleBuilder = handleCronScheduleMisfirePolicy(job, cronScheduleBuilder);

        // 按新的cronExpression表达式构建一个新的trigger
        CronTrigger trigger = TriggerBuilder.newTrigger().withIdentity(getTriggerKey(jobId, jobGroup))
                .withSchedule(cronScheduleBuilder).build();

        // 放入参数，运行时的方法可以获取
        jobDetail.getJobDataMap().put(ScheduleConstants.TASK_PROPERTIES, job);

        // 判断是否存在
        if (scheduler.checkExists(jobKey)) {
            // 防止创建时存在数据问题 先移除，然后在执行创建操作
            scheduler.deleteJob(jobKey);
        }

        scheduler.scheduleJob(jobDetail, trigger);

        // 暂停任务
        if (job.getStatus().equals(ScheduleConstants.Status.PAUSE.getValue())) {
            scheduler.pauseJob(jobKey);
        }
    }

    /**
     * 设置定时任务策略
     */
    public static CronScheduleBuilder handleCronScheduleMisfirePolicy(Job job, CronScheduleBuilder cb)
            throws TaskException {
        return switch (job.getMisfirePolicy()) {
            case ScheduleConstants.MISFIRE_DEFAULT -> cb;
            case ScheduleConstants.MISFIRE_IGNORE_MISFIRES -> cb.withMisfireHandlingInstructionIgnoreMisfires();
            case ScheduleConstants.MISFIRE_FIRE_AND_PROCEED -> cb.withMisfireHandlingInstructionFireAndProceed();
            case ScheduleConstants.MISFIRE_DO_NOTHING -> cb.withMisfireHandlingInstructionDoNothing();
            default -> throw new TaskException("The task misfire policy '" + job.getMisfirePolicy()
                    + "' cannot be used in cron schedule tasks", Code.CONFIG_ERROR);
        };
    }
}